Process for extracting biomedical devices

Details Process for extracting biomedical devices Process for extracting biomedical devices

A - Human Necessities

61

L

A61L 12/04 (2006.01) A61L 12/14 (2006.01) A61L 27/18 (2006.01) B29C 71/00 (2006.01) B29D 11/00 (2006.01) C08J 7/02 (2006.01) G02B 1/04 (2006.01)

Patent

CA 2564212

A process for treating biomedical devices, especially contact lenses, involves contacting polymeric devices containing extractables with a solvent that dissolves and removes the extractables from the devices. The devices are subjected to at least two treatments with solvent to remove extractables in the devices. One of the treatment steps involves solvent used as a final rinse for a prior batch of devices. The solvent may be circulated through a series of tanks, in which case the devices are first extracted in the downstream tanks, followed by extraction in the first tank containing fresh incoming solvent.

Un procédé pour traiter des dispositifs biomédicaux, en particulier des lentilles de contact, concerne la mise en contact de dispositifs polymériques contenant des produits extractibles avec un solvant qui dissout et retire les produits extractibles des dispositifs. Les dispositifs sont soumis à au moins deux traitements avec le solvant pour retirer les produits extractibles dans les dispositifs. L~une des étapes de traitement concerne un solvant utilisé comme un rinçage final pour un lot préalable de dispositifs. Le solvant peut circuler à travers une série de récipients, auquel cas les dispositifs sont d~abord extraits dans les récipients en aval, suivi par une extraction dans le premier récipient contenant le solvant entrant frais.

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